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Ivenika [448]
3 years ago
12

A sled is being pulled to the left by 5 dogs each dog is pulling with

Physics
1 answer:
xeze [42]3 years ago
6 0

Answer:

Since the five forces applied are all in the same direction with the motion of the sled, to solve for the net force, add the five forces together. Therefore, the net force is 30 Newtons.

Explanation:

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A 0.0208 m diameter coin rolls up a 18.0◦ inclined plane. The coin starts with an initial angular speed of 56.0 rad/s and rolls
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Answer:

h = 0.0259 m

Explanation:

given,

diameter of the cone = 0.0208 m

                     radius,r = 0.0104 m

angle of inclination,θ = 18°

initial angular velocity, ω_i = 56 rad/s

final angular velocity ,ω_f = 0 rad/s

height, h = ?

Rotational kinetic energy

KE_r = \dfrac{1}{2}I\omega^2

Moment of inertia of coin

I = \dfrac{1}{2}MR^2

so,

KE_r = \dfrac{1}{4}MR^2\omega^2

Transnational Kinetic energy

KE_t = \dfrac{1}{2}Mv^2

v = r ω

KE_t = \dfrac{1}{2}MR^2\omega^2

now,

using conservation energy

Kinetic energy of the coin is converted into the potential energy  

KE_r + KE_t = PE

\dfrac{1}{4}MR^2\omega^2 + \dfrac{1}{2}MR^2\omega^2 = Mgh

\dfrac{3}{4}R^2\omega^2=gh

\dfrac{3}{4}\times 0.0104^2\times 56^2=9.8\times h

h = 0.0259 m

Vertical height gain by the coin is equal to 0.0259 m

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